English

Locally dualizable modules abound

Commutative Algebra 2024-01-05 v1 Representation Theory

Abstract

It is proved that given any prime ideal p\mathfrak{p} of height at least 2 in a countable commutative noetherian ring AA, there are uncountably many more dualizable objects in the p\mathfrak{p}-local p\mathfrak{p}-torsion stratum of the derived category of AA than those that are obtained as retracts of images of perfect AA-complexes. An analogous result is established dealing with the stable module category of the group algebra, over a countable field of positive characteristic pp, of an elementary abelian pp-group of rank at least 3.

Keywords

Cite

@article{arxiv.2401.02350,
  title  = {Locally dualizable modules abound},
  author = {Jon F. Carlson and Srikanth B. Iyengar},
  journal= {arXiv preprint arXiv:2401.02350},
  year   = {2024}
}

Comments

7 pages

R2 v1 2026-06-28T14:08:48.433Z